AJFA. Kill 'Em All is not nearly as good as the other three.
We get it. You like AJFA.
Master of Puppets... no doubt. It had all the speed, heaviness and awesome songwriting of RTL with better production none of the cheesiness of tracks like Escape and Trapped Under Ice.
Escape is cheesy but if you don't like Trapped Under Ice, you can just gtfo right now.
I don't think MOP and RTL even compare. RTL's production and solo style (wild and thrashy) make it a more ideal aggressive thrash album whereas MOP's sleeker production and more melodic solos bring it more in line with epic/heavy metal with thrash riffs.
OUT FOR MY OWN
OUT TO BE FREEEEEEEEEEEEEEEEEEEEEEEEEEEEEE